MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Sign
Any objective evidence of disease. Gross blood in the stool is a sign of disease. It can be recognized by the patient, doctor, nurse, or others. In contrast, a symptom is, by its nature, subjective. Abdominal pain is a symptom. It is…
Read the definitionRandom terms
Show more- On call In medicine, the person who is ready to respond, the one on duty. As in 'Who is the doctor on call this…
- Bovine genome The genome of the cow (Bos taurus). The bovine genome is similar in size to the genomes of humans and other…
- Tarsus Any broad flat surface. The flat of the eyelid is called the tarsus, as is the base of the heel. The bones in…
- Incest Sexual activity between individuals so closely related that marriage is prohibited. Incest involving a child…
- Vena cava, inferior A large vein that receives blood from the lower extremities, pelvis and abdomen and empties it into the right…
- Plasticity, brain See Neuroplasticity
- Vesicant A substance that causes tissue blistering. A blister agent. Also called a vesicatory.Vesicants are highly…
- Cerebral aneurysm A localized widening of a vessel within the brain. See: Berry aneurysm
- Wilkins, Lawson American physician (1894-1963) who founded pediatric endocrinology. At Johns Hopkins Medical School in…
- Valve, mitral One of the four valves of the heart, the mitral valve is situated between the left atrium and the left…
- Neuroblastoma Neuroblastoma: A leading childhood form of cancer that arises in the adrenal gland or in tissue in the…
- Bronchitis Bronchitis: Inflammation and swelling of the bronchi. Bronchitis can be acute or chronic. Chronic bronchitis…